Coking retort oven



'7 Sheets-Sheet l J. VAN ACKEREN coKING RETORT ovEN Filed Dec. 28, 1926lll Dec. 22, 1931.

Dec. 22, 1931. .1. VANACKEREN 1,837,301

COKING RETORT OVEN Filed Dec. 28. 926 '7 Sheets-Sheet 2 J. VAN ACKEREN v1,837,301

COKING RETORT OVEN Filed DeC- 28. 1926 '7 Sheets-Sheet 5 Dec. 22, 1931.

kw`- J 5% o Sw o Q 4 Nk o Rm h YR o o J. VAN ACKEREN COKING RETORT OVENFiled Dec.` 2B, 1926 7 Sheets-Sheet 4 Dec. 22, 1931.

Dec. 22, 1931. .1. v-AN AcKEREN 1,837,301

COKING RETORTOVEN I FiledvDeG. 28. 1926 T Sheets-Sheet 5 WA K SID Dec.22, 1931. J. VAN ACKEREN 1,837,301

COKING RETORT OVEN Filed Dec. 28, 1926 7 Sheets-Sheet 6 lNVi-INTOR/z/yy/m M;

22/ ATTORNEY Dec. 22, 1931. J, VAN ACKEREN 1,837,301

COKING RETORT OVEN Filed Dec. 28. 1926 7 Sheets-Sheet 7 SECT/awon 6-INVENTOR W 7a KW ATTORNEY Patented Dec. 22, 1931 Unirse; erst-.SES

irse.;reNr i .Josera via scream, er Pim-mwen, semestrales, esser@ 'roseaKeri-sas. COMPANY. or rlerseveea, Errenteria #retrasarse er Barren-fvwm@KING smeer ever This invention comprehends improvef ments of generalutility in ,coking retortoven art; and also comprehends certainimprovements especially applicable to coking retort ovens of the Welllrnown cross-,regenerative type exemplified in the patent to J. Becker,No. 1,374,546, dated April 12, 1921.

The invention has for its objects the provision ofa colring retort ovenhaving, as an important characteristic, an extreme flexibility inoperation and the readyadaptability of the oven for operation-.eitherWith producer gasas a fuel, `oryvith coke-'oven gas burned in anatmosphere of ordinary preheated air, such as is utilized infordinarycolzeovens, or with colte oven gas burned in an atmosphere containingboth and a neutral gaseous diluent which isintroduced into thecombustion fines separately from the air. conversion of ,the oven foroperation a0- cording to any one of the modespecified, may

be effected Without making any material ad'- jutments, vother thanvarying the operation Cil of installed control parts, as will behereinafter more fullyexplained. I

A further object of the invention is to provide control mechanism forperiodically in continuous motion the mechanism thatV operates thelevers that reverse the valves for the gas supply, air supply, and WastegasV outlets, a great saving in energyis effected by reason ofthe factthat the amount of energy consumed in maintaining such mechanism inVcontinuous motion .is less .than the initial energy consumed invstopping iand restarting suoli mechanism when it is operated.intermittently. By the invention, tvvo such-continuously movingmechanisinsare used each having a dog for moving engagers, in,-

By the invention, a 'quick and ready divdual t0 each' O11101110 ofregenerators and fines, ,that .actuelle said valvesf These Q01tinuouslyinoving mechanisms are timedso thatanpI-oximately one hour is,consumed before each dog passes a given point and, theller fore, eachdog .atuates ,each engager .Once

n every hour. The dogs are located onleach of half hour, by an.intermittently operating mechanism. Y

` ,In addition to the generalfobjects recited above, the invention hasfor further ,objects such other improvementsror advantagesv inconstruction and operation as are found to obtain 1n the structure anddevices hereinafter described or claimed. Y

In .the accompanying drawings, forming a 'part Aofthis speoification,and showing, for

pur-poses ,of exemplification a preferred form and manner in which theinvention mayV be embodied and practiced, but Without limiting theclaimed invention specifically to such illustrative. instance orinstances: Y

Figure 1 isa fragmentary vertical transverse sectional .view ltliroi'igha coke oven battery and illustrating the relative position of the"several parts thereof and the arrangementof the control devices andmains with respect theretolV i V is a side elevational vievyT on ,alarger scale of a portion of the coke'side of an oven the reversingmechanism for controlling'tlie 'Y ioo the reversing mechanisms on thecoke side of the oven battery.

Fig. 5 is a diagrammatic horizontal sectional view taken through a cokeoven battery, showing the reversing mechanism in plan view.

F ig. 6 is a View similar' to F ig. 4 but illustrating the continuouslymoving chain mechanism which actuates the reversing mechanism on thepusher side of the oven battery.

Fig. T is a composite vertical sectional elevation taken transversely ofa coke oven battery in planes indicated by the lines D-D, E-E and F-F ofF ig. 1.

F ig. 8 is a composite Vertical sectional elevational view talientransversely of a coke oven battery in planes indicated by the lines B Band G-C of F ig. 2.

The same characters of reference indicate the same parts throughout theseveral views.

In the embodiment of the invention illustrated in the drawings, theinvention is incorporated in a combination colre oven battery, i. e., abattery having provision for being operated either With producer gas asa fuel or with coke oven gas burned in an atmosphere of ordinarypreheated air, such as is utilized in ordinary coke ovens, or with cokeoven gas burned in an atmosphere containing both air and a neutralgaseous diluent which is introduced into the flame flues separately fromthe air. A combination colte oven battery having these features is shownand described in patent to J. Becker, No. 1,574,545, dated April 12,1921.

For convenience, the present description will be contined to the presentillustrated embodiment of the invention in such combination ovenbattery; the novel features and improvements made by the invention aresusceptible of other applications, such, for example, as for ordinaryso-called coke ovens employing coke oven gas as a fuel, or for ordinaryso-called gas ovens employing producer gas as a fuel; hence, the scopeof the invention is not confined to the specific use and speciiicembodiment herein described as an illustrative example.

Referring to the drawings, there are illustrated views of a coke ovenbattery or plant of the by-product type, having features abovespecified; said oven battery embodies in its construction a plurality ofcrosswise elongated heating walls 11 and a plurality of inintermediatecrosswise elongated colring chambers 12. The heating walls 11 form theside walls of the respective colring chambers 12, as shown moreparticularly in F ig. 1, and, in the present instance, are directlysupported by the heavy supporting or pillar walls 13 and 22, Figs. 1, 5and 7, which extend crosswise of the battery. These pillar walls,together with other walls, hereinafter Ydescribed, collectively form themain support for the entire super-structure of the oven battery and arethemselves supported upon a flat mat or platform which constitutes thesub-foundation on which the entire battery rests.

The coal to be coked is charged into the several coliing chambers orovens through charging holes lll located in the top 15 of the ovenbatt-ery and positioned directly above the oven or chambers 12, as shownin Fig. 1. lhese charging holes la are equipped with the usual removablecovers, which are rcmoved during the charging of the individual ovens orcolring chambers and which are placed in position to close the tops ofsuch coking chambers during the colring or distilling operation. The ofdistillation pass from' the tops of the several colring chambers 12through gas outlets 16 (Fig. 1) and thence through ascension pipes (notshown) into the usual gas collecting main which carries the distillationproducts to the by-product recovery apparatus.

Heat for colring the charges of coal in the several ovens or chambers 12is derived from the heating walls 11, which, as above mentioned, extendcrosswise of the battery at the sides of the coking chambers. Eachheating wall 11 is constituted of a plurality of the usual dame orcombustion flues 17 and are operatively disposed in a single group, thatis to say all of the iiucs of each heating wall operate concurrently asuptlow or downflow iues, as will be hereinafter more fully explained.lVhen the flame fines on one side of a colring chamber are burning, thatis to say, operating for upflow, the flame flues on the opposite side ofthe same coking chamber are operating for downflow to permit exhaust ofthe waste gases. Consequently flame heating is maintained continuouslyfrom end to end on one side of a charge of colring coal in each colringchamber, the name heat being applied to the full length of one side ofsuch charge during an entire period, and, then, after reversal, beingapplied to the full length of the opposite side of the charge, until asubsequent reversal is effected.

The crosswise regenerators 18 of the retort oven or battery are locatedin planes beneath the planes of the aforesaid heating walls 1l andcoking chambers 12, and, in the present instance, extend in parallelismbetween the pillar walls 13, and the other heavy supporting walls 22.hereinafter described. Located in the middle lengthwise vertical planeof the coke oven battery, is a vertical partition 19, as shown in Fig.1, which partition extends all the way up from the mat of the battery tothe bottom of the overlying colring chamber and from one to the other ofthe pillar walls 13, and the other walls 22 which are between the pillarWalls. rlhe regenerators, which are respectively located on oppositesides of the battery, extend inwardly to f (Il said partition 19 and areseparated thereby.

This arrangement permits control from opposite sides of the battery ofthe flow through Y distribution.

Each regenerator lS'is a chamber containing open briclr work, commonlycalled check-` er work, and indicated at 20, withY afdistributing solechannell2lunderneath such Vcheclrer worl, the channels forming the solesof :eifach chambers and opening np into the chech` er work.` Y i heavyvertical gas-'tight sup porting wall 22 extendsdirectly beneath each ofthe colring' chambers -in parallelism between each two adjacentpillarwalls 13 (Fig 5) and such supporting walls 22 provide twoV regeneratorsG and H located respectively on the opposite sides of such-walls 22 andben tween adjacentV pillar walls 13, The several walls 22 also have thefunctionY with the pilv` -theweieht of the battery super-structure. 1

This supporting wall construction provides two series ofcross-wise-extending parallel gas-tight load-carrying walls locatedbelow the colring chambers and intermediate heatwalls, the pillar walls13 ofone series being directly beneath the heating walls and thesupporting walls '22 of the other series being directlybeneath thecoking chambers. The walls 22 which are beneaththe coking chambers areconstructed and function not as mere partitions commonly employed, butas true load-carrying gas-tight walls, permitt; g rea-tively differentpressures to be maintained. in the checkerwork chambers on the op osite`sides of such walls, orV the flowof dii'lerent media in the checkerworkchambers separated by these walls, without leakage from onecheclrerworlchamber into ano-ther and without danger of mixing gases in thecheclrerworr chambers which must be 'kept separate in this region of thebattery. i l

`Theregenerators G and AHare heated,`in alternation, by thehotcombustion products that draw oil? from the flame or combustion fineshereinbeforementioned and then impart such heat to the medium that theyfeed into these llame fines; in the present instance, the

llow through the regenerators, G, H, between each two adjacent pillarwalls V13 is maintained `concu 1rently in opposite directions, forexample, whenthe flow is passing up through a refrenerator G on one sideof supporting wall 22, down-flow is being maintainedV concurrentlythrough 4tlie other regenerator H on the "other side of that supportingwall22. f

funnl is provided with a series of ducts 23, each Vdect of each seriesleading respectively to one tween-saidregenerators Withthis construcfthe'coope'rating regeneratorsG and tion, each flame flue communicates bya plurality of ducts 23 with adjacent separate regenerators G and H andthe flow through the regenerators which are respectively located onopposite Vsides of a pillar wall 13is mainlained concurrently in thesame direction,

Vthat is to-say,yboth of said regenerators are either operating 'forinfiowor for outflow.

ln the present Vembodiment of the invention, the entire series of llamenues of each heatiiigw-all ll is either burning or operating fordown-flow to convey waste gas prodrrcts to theregenerators beneath andconse- `quently the regen-erators aligned on opposite sides of thecentral longitudinalpartition 19 operate Iconcurrently fort-low in thesaine d1- reotion and in the same manner. The reversal in flow throughthe flame flu'es on opposite sides of a colring chamber, and theircommu- Ynicably connected regenerators may thus be said'to takeplacelongitudinally of the oven battery, instead of transversely thereof. Thereversal of the oven is elfected at the end of operating period which isdetermined by practice, andiby means of the novel reversing mechanismpresently to be described. The flnnction of s'uchreversal is as follows:v The "regenerators that Yprior to the reversal oper- Vfated as inflowregenerators become outflow regenerators, and the youtflow operatingregenerators become inflow operating regener ators; theLip-burningseries of flue switches function with the down-burning series0f lines 1of the -next'lsadjaeent heating wall, and the supply of gas isturned off from the previously iup-burningv flues and turnedon into themains of 'the' lpreviously downeburning flues, as is fully'shownanddescribed in the patent to J. BeckenNo."1,374,546, previously mentioned.I Y l Each llame 4flue of each heating wall has at its top a porteropening 24 for vdraft and the passage of combustion products or wastegas from the flame within the flue. rlhese ports open up intolhorizontal transversely extending bus fiues 25 formed in the heatingwalls and connecting all ofthe vertical lues that communicate therewithvthrough said ports. Each heating wall is provided with a plurality of,in the present instance, two

of such horizontal rines which are positioned the same ovenby means ofthe said passagef ways. These passagewa-ys or channels25 preferably openupinto substantially the middle portions of their respective connectedtlues, as shown in F ig. l, and extend in a direction longitudinally ofthe oven battery. rlhus the entire flow from a heating Wall, Within thellues ot which combustion is being maintained, passes through saidpassagevvays and downwardly through all of the ilues ot the nextadjacent heating Wall and each reversal operation is accompanied by areversal in the direction in the flow of all of the lues of each heatingWall.

ll`he draft through the ports may be regulated by means of the usualmovable dampers or sliding bricks, positioned in the ordinary Way in thebottoms of the horizontal llues 25 and adapted to be reached by accessilues 28 which extend from the top of the horizontal iues in eachheating Wall to the top l5 of the battery, there being an access tluepositioned over each flame or combustion tine ot' each. heating Wall.

Extending crosswise of the battery in each pillar Wall 13 and located inend to end relation with respect to each other beneath the heating ivall'li therea-bove are tivo gas supply channels 2G. These channels are forthe purpose of supplying colte oven gas to the several ilaine liucs oneach side of the central 30 l e L, and to accomplish this end, thechannel on the near or pusher side of the battery communicates with theindividual tlues on the saine side of the said line L by means ot ductsthat lead from such channel individually into the bottoms of individualtlues; and the channel which supplies the several tiues that arerlocatedon Vthe far or coke side of the battery communicates therewith by meansof similarly connecting ducts 3l. Hthin the several ducts are disposedthe usual nozzles 8 which direct the tlanie vertically Within the headngor flame tlues.

The iiereiiibetore described iid described iii detail i c u, Nos.1,3?546 and l, l

nt invention relates to the rey .iisin for the battery, the parts f nare not needed for an understanding oi" invention having been omittedironi 50 :Sie draiiings.

previously stated. the solo channels 2l extend in opposite directionsbeneath the checker vorl; .e respective regeneratois on oppor-.ite sidesof the vertical partition 'i9 :"Cd each et these channels is providedwith a flow boi: iiovv boxes 83 are arranged in paiisnlone; each side ofthe oven battery and communicate with waste gastunnels Q1-L1 thi-oralivertical ducts 353.

The dow l1 o which communicate with or and lil are indicated at (jpectiv ly in Fig. 2 oi the drawings. arrangement the iloiv boxes gf and7L or each pair communicate through their respective regenerator G and7l With a single heating Wall. Gas mains 36 are mounted 1 P L n uponbracket members 3f and extend longitudinally along opposite sides of thebattery. These mains are cominuiiicably connected to sources ot supplyof both coke oven gas and a special generator gas, such as producer das,and when the oven is being operated tii either ot these gases as a fuel,the mains cut oil from the supply of the other gas. 'lliat is to say,the mains 36 are employed to separately supply either coke oven gas orproducer gas to the flame fines, ac-

i .V 'i i 4i 'l 1.' coidiiig to die oesired operation of the battery.

plurality ot vertically extending pipes are arranged along each side ofthe batniiet-ted, adjacent to their lov-.fer ends,

.vitsi the i'low bones fi of each of the pairs of nov: boxes by means otpipes d0 and valve n :i 'lhese pipes 38 are also conand Haine nozzles of.c :ply cham els 26, which are located ii ,r r portion or the severalflame liues,

upwardly and inwardly inclined p rtically disposed pipes 43, and li .lypositioned pipes li-t. A valve 45 p with an operating lever 46 is loci reo ch of the vertical pipes by means of he supply of gas to the nozzlesin tl; mains may be interrupted when tl operating with producer gas asas will be hereinf. er described.

' 'e members i-, provided with operat- 'ers or arms l-S, are located inthe Verl L 3S and are adapted to be periactuated in alternation toestablish l "rh communication between the the regenerators and laine dieoven.. The flow boites g and 71. ot the pairs oft i'egenerators are eachly provided with internally disl iaust valves or dampers 50 and l, asint-.icaied by dotted linesy in Fig. 2. The faire members 50 and 5l olieach pair are provided Avvith operating levers 52 and which areconnected together their upper ends by means ot links 54 so that thevalves 50 :in l 5l oit each ot' the pairs of A)flow boxes will move inunison to simultaneously establisli or interrupt communication betweentheir respective vsole channels 2l andthe Waste gas tunnels 84C.

The iioiv boxes g and of each pair are also respectively7 provided Withair inlet valve members covers 55 and which may be periodical y openedto admit air to the fionv bones under certain conditions ot operation,as will be presently described. rlhe valve members 55 and 56 arerespectively pivotally connected to the arms 57 and 58 ot bell cranklevers 59 and 60 which are mounted upon the upper portions of the HOWboxes g L -1, ina iin-es oi oi cacii resitecl and ft as at 61. The otherarms 62 and 63 of the bell crank levers159 and 60 emend upwardly and maybe connected similarly to the flow box valve levers 52 and 53 in pairsby means of links-64, which are shown in dot ted lines iii-Fig. 2.`However, in the particular .i ation to 56 of the flow boxes .7a arenotoperatedbut l are maintained in closed positions throughout theoperation of the oven battery and are employed only in connection with afuel gasl which requires a larger percentage of air for satisfactorycombustion. The covers 55 of the flowY boxes g are actuated under allconditions of operation, and are moved simultaneously with the exhaustvalves or dainpers 56 and 51 of the adjacent pairs of-flowl boxesby'meansof links 65 which cross-connect the arms 62 of the bell crank`levers 59, which lactuatethe air inlet cover 55'of the flow boxes g ofone ofthe pair vof flow boxes, with the arm-s 52 and 53 of the flowbox-es g and t of the adjacent pair.

` l'twill-be observed from an inspection of 2 of the drawingsl thatseveral valve elements of the iiowln'ixesv g and 7an of one of the pairsofl flow boxes Aare mounted to operatev in opposite directions fromthose of the ad- `jacent pair and are so interconnected by inea-ns ofthe above described link and lever mechanism that when thevalves and 51of Y one of vthe pairs of flow boxes g and 7L are l open to permit thewaste products of com- Mfbustion'to escape to thewaste gasqtunnels 3.4.4the air inl-et valve of the flow box g of the adjacentpair is alsoin an'open Iposi-A tion; and conversely, when the valve 55`1of the flow box ois in a closed positionA the valves 56and 51 of the adjacent pair ofvflow boxes r/ and are also in closed positions. That is to say, the airinlet valve 55 of one pairof fir wboxes operates in unison andsimultaneouslyrwith the exhaust valves 50 and 51 of the adjacent pair.

on each side of the battery and the mechanism oneach side is actuated intimed relation with respect to each other by means of the followinginstrumentalities. 'Y

A frame 66 extends longitudinally along both sides of the oven batteryand this frame carries, `at spaced -intervalsfa plurality oftransverseljjv7 extending shafts 67l andV 68 which A'are rotatablymounted inelongated bearing blocks 69. A gea-r'wheel 70is keyed .to theinner extremity'of each of the shafts be described Y the covers Thevalve `mechanism heretofore described is substantially thesame arm 7 3and extends downwardly and is vpivotally connected at its .other end tothe arm 62 of one of the bell crank levers 59 which actuates one of theair inlet valves L55 of the A gearwheel-75 is keyed at the outer end ofeach of` the shafts 67 and 68and meshes with a gear wheel 76 whichV isfixed to the outer end of a stub shaft 77. n The shaft 77 is rotatablymounted in one of the bearing blocks 69 carried by the frame 66 andin'axial alignment with the stub shaft 72. A-`4V crank arm 7 8 is fixedto the outer end of each of the shafts 77 and is operatively connectedtothe arm 48 of the gas valve 47 by means of a'link 79. rlhe gear wheels70 and 7l and also the gear wheels 7 5 and 76 are of a two to one ratioand consequently one quarter revolution of the gear wheels 70 and 75.will

cause acne-half revolution of their co-actingz gears 71 and 76. Theresult is that when the gear wheels70 and 75 are rotatedone quarter Vofa revolution, by means of mechanism presently to be described, the'crank arms 73 and 78 will be moved through arcs of 18()otojsimultaneouslyeither open or close the air inlet valve55 and gasvalve 47 for one pair of -regenerators and fluesand also the' wastegasvalves 50 and -51 of theV corresponding' adjacent pairl of regeneratorsand lines. Y

Each of the shafts 67 is provided with a pair of star wheels or engagersauand ZJ and the shafts 68 are also each provided with similar engagerscli and d. Each of the engagers comprises a hub portion and a.

plurality of radia-llyextendin'g arms81 hav-` ing bifuroatedendport-ions 82.'fpp'lhe"inner loosely mounted upon the shafts67 and 68Vfor free-rotation thereon but the "outer'engagers b and d arerespectively keyedto the shafts 67 and 68 so that any force tending torotate the fixed engagers will be trans- Y Vmitted to their supportingshafts. The outer portion of the hub 8O of the loose engager a isprovided with aV sprocket wheel 83which is connected with a sprocketwheel 84 prolvided on the inner portion of the hub 80 of the fixedengager d, that is keyed to the shaft-.68,l by means of ai sprocketchain 85. Y A

vmost engagersfa and o of each pair are sprocketV wheel 86 is also keyedto the shaft 67 and is connected with al sprocket wheel 87 which isprovided on the hub 8O of the loose engager c bylneans of a sprocket'chain 88.

By means of this particular construction,

if the enga-ger a is actuated it will rotate freely upon the shaft 67but will cause the rotation of the fixed engager CZ and the# shaft68,also `if the engager is actuated it will `cause. the rotation of theshaft 67 vsprocket wheel 86 and engager c, through the medium of thesprocket chain 88, but as the engager cwis mounted loosely upon theshaftV 68 'no motion will be transmitted thereto. Gn the other hand ifthe loose engager c is rotated freely upon the shaft 68 the shaft 67will be rotated through the medium of the sprocket wheel 87 and thefixed sprocket wheel 86 and the sprocket chain 88 and also cause therotation of the engager which is keyed to this shaft. 1f the fixedengager CZ is rotated its shaft 68 will be also rotated together withthe engager a through the medium of the sprocket chain 85, but as theengager a is mounted for free rotation upon the shaft 67 no motion willbe imparted thereto.

The several engagers a, b, o, and d are actuated periodically and insuccession to reverse the operation of the oven battery by means ofinner and outer endless engager chains 89 and 90 respectively whichextend longitudinally along each side of the oven battery and each ofwhich carries one or more dogs 91 and 92 respectively. rThe dog 91carried by the chain 89 is staggered with respect to the dog 92 which isprovided on the chain 90 so that the dog 91 will be one-half hour behindthe dog 92 and not move the engagers that actuate the valve levers ofeach oven until one-half hour after the dog 92 moved its respectiveengagers, and as a consequence the enga-gers a, c, b and d arealternately actuated.

These chains 89 and 90 pass around a plurality of driving sprocketwheels 98 and 94 which are keyed to a common shaft 95 located at one endof the battery (Fig. ifi-.t the other end of the battery the chains 89and 90 pass over idler wheels 96 and 97 which are suitably mounted inavhorizontally movable frame structure or carriage 98. A cable 99 passesover a sheave or pulley 100 and is secured at one end to the frame 98and is provided at its other end with a weight 101 which may be adjustedto maintain the proper tension upon the cables 89 and 90. The upperflights of the engager chains 89 l and 90 ride in the bifurcatedportions 82 of the engager arms 81 which are therefore constantly in thepath of travel of the dogs 91 and 92 but the lower flights of thesechains are supported at intervals by means of idler pulleys 102.

A shaft 103 extends transversely across one end of the battery and isprovided at each end with a sprocket wheel 104. These sprocket Wheelsare connected by means of sprocket chains 106 to sprocket Wheels 105which are fixed to the inner ends of the shafts.

@ne of the shafts 95 is provided with a wheel 107 which is driven by anelectric motor 108 through the medium of suitable reduction gearmechanism 109. It will be apparent from the foregoing that thehereinbefore described reversing mechanisms located on each side of theoven battery are operated in unison and in timed relation with eachother, and the speed of said chains may be regulated by said reductiongearing so that each of the dogs passes a given point in one hour, ormore if desired, depending on the number of dogs on a chain.

The operation of the reversing mechanism when producer gas is utilizedas a fuel is as follows:

Assuming that the several valves on both sides of the battery are in thepositions shown in Figs. 2 and 3 and that the engager chains 89 and 90are advancing in the direction indicated by the arrow in these figures,the dog 92 has just' engaged one of the arms of the outer fixed engagerwheel b, for the four flow boxes from the left hand side of Fig. 2,which are illustrated in the intermediate reversal position, that is,the posi tions they assume just after a shutoff and before the turn on,and caused the shaft G7 to rotate. This movement of the engager hascaused the arm 78 to move one-half of a revolution, and has beenpreviously described, and actuated the valve 47 in the vertical pipe 38leading to the second flow box from the left hand side, to cut off thesupply of producer gas from the fiame fines which are supplied throughthis valve. The arm 73 will also be rotated at the same time one-half ofa'revolution to move the lever 74 and thereby simultaneously close theair inlet valve 55 of the fiow box g of the first pair and to close theexhaust valves or dampers and 51 of the fiow boxes g and 7L of the nextadjacent second pair, and the rotation of the shaft 67 will rotate thegear wheel 86 and chain 88 which will rotate the gear wheel 87, but thegear Wheel 87 will not cause rotation of the shaft 68 as it is loosethereon and not fixed. The dog 92 will then pass to and engage the armsof the engager d which is fixed to the shaft 68 and cause the arm 78 ofd to move one-half of a revolution, as has been previously described,and actuate the valve 47 through the levers 79 and 48 to turn on thesupply of producer gasto the regenerators which are supplied throughthis valve 47 in the vertical pipe 38 leading to the flow box L of thcsecond pair from the left, and the arm 7 3 of d will also be rotatedone-half of a revolution and its leverl 74 to simultaneously open theair inlet valve of the flow box g of the second pair-and the exhaustvalves or dampers 50 and 51 of the flow boxes g and 7L of the firstpair. This rotation of the shaft 68 will cause rotation of the engager abut the engager a will not cause rotation of the shaft 67 as it is loosethereon and not fixed thereto. By the reversal movement just described,the functions of the first pair of regenerators g, t, which wereoperating for inflow will have been reversed and will operate as outflowregenerators when the engager d is moved and the second pair ofregenerators'g and I/which were operating, for inflow or,

for outflow vwill then operate flame burning; 1 y. 1 i Y By reason ofthe fact that the dogs 9i and 92 are staggered with respect to eachvother and are disposed at one half an hours dis- V tance 'apartlongitudinally, the dog 9i. will next engage the loose engager at onehalfV iour after said dog 92 engaged the `engager l and causeit torotate one quarterl of a revolution. This partial rotation of the enrotation thereof and the arms 73 and79 which are associated therewith tomove one half of a revolution` and closeA the exhaust'.` valves 50aud 51of the first'fpair of flow bones g and 7L and the air inlet valve 55 ofthe flow box g of thesecond pair and to also actuate the valve 47andstop the vsupply from the gas pipe 38 of the second pair. of flowboxes. The. dog 91 next passes on and en gages the loose engager c.which rotates the shaft 67 by meansof gear wheels 87 and 86 and chain 88and its engagement Ytherewith will cause the gas to How into the flowbox of the first pair and the lid 55 of theflow` box f] of thev firstpair to open and cause the valves 50 and 51 of thesecond pair of flowboxes to vopen and therebyeif'ect a 'second reversal of flow so that theirstpair of regenerators are now operating for inflow Aand the secondpair for outflow.

Durinothe comparatively short period of time between the shutting ofl'of the gas and air in one pair of flow boxes and regenerators and theturning on ofthe gas and air in the other pair of flow. boxes andregenerators,

which period is only the time required for the 9i to pass from the looseengager' a to the loose engagerfc or, orthe dog 92 to pass from thefixed engager"b to .the fined engager al, no gas or airwill flow intothe flues and the time between the shut-off and the turn on issuiiicient to allow the gas and air that are still in these fiues-.tocomplete their combustion beforethe airian'd gas is started flowing inthe reverse direction.

. fter the dog 92 passes theengager al 'for the four flow boxes at theleft in Fig. 2, it then actuates the engagero for the nent four flowbores to the right in Fig.g2 (these four flow bores together with theirvalves and levers, etc., illustrate the position of' the d' parts beforetheir reversal) which shuts o the gas and the air on'the first two iiowbores and closes the valves and 5l of the nent Y two flow boites to theright. rEhe dog 92 be- This engager, beingv .keyed to the shaft 68 willcause the partial g desirable.

' fines arms 4:6 which operate the valves 45 gas and the air for thesecond pair and opens thevalves 50-and 5l of the first pair, the dogpassing on and operatin g in the same manner each engager b and .cZthroughout the bat-V tery in succession- The dog` 91, being onehalf hourbehind the dog92,` actuates the engagers a and o for each four flowboxes, oneA half hour after the dog 92, and it continues onin the samemanner, as above described, operating each'engager a and c throughoutthe battery in succession.

YIt will be understood that more than one dog may be provided along theengager chains S9" and 90to' actuate eachv of the engagers but-theyshould be so spaced from each other andthe speed of the continuouslymov-A ing chain regulated so that the fiow'for each oven is reversedperiodically'every one-half hour or such other period of time as may beEach dog 9i engages the engagers a and c of each oven in succession andeach dog 92 engages the engagers b and d of each oven in successionlongitudinally of Vthe battery.

By vreason of this timing of the several actuating instrumentalities,producer gas-.is supplied to theV flow boxes h of Valternate pairs andvtheir communicating regenerators and llame fluesand at the same timeair is admitvted to the regenerators and communicating rip-burning fluesto support combustion through the cooperating iow bores g of such pairs.

V rlfhe pairs of flow boxes g and 7i which are located between thosepairs supplying gas and air to the up-burning flame flues are operatingto deliver the waster gas or products of combustion to the waste gasvtunnels 34. The operation of the' several flame flues consequentlyprogresses longitudinally through# Vout the'length of the battery, therip-burning flues alternately becoming down-burning flues and thoseoperating las down-burning alternately becoming rip-burning fiues.

.lf it is desiredto employ coke oven gas as 'fuel the `supply of.producer gas is cut off from the gas mains 36 and a supply of coke ovengas is Vturned on into these mains.

The arms 62 and 63 of the bell crank levers 59 and GO'WhichV operate theair inlet valves and of the .pairs of flow boxes g and.

L are connected by means of the linlrs (shown bythe dotted lines inFig.v 2) and the arms 48 which operate the gas valves i7 in the verticalpipes 38 are .also connected to the in the pipes e3. by means of links110. The valves 4l, which are locatedin the pipes 4:0, are

turned off to prevent the coke oven gas from flowing into the flow boxes7a which are only used for gas when the oven is operating with producergas as a fuel.

The operation Vof the reversing mechanism and valve elements of the ovenbattery with these slight changes, issubstantially the saine as thathereinbefore described in connection with the operation of the oven withproducer gas, the only difference being that first; instead of sfpplying producer gas through the flowv boxes It that communicate withthe uli-burnin@ Haes coke oven Oas is su L C l ID l'l "'f fl th1 hunYlelp icc to incse ues ioug no noaz Ls o cated in the pipes Q6 in thelower portions thereof; and7 second; instead of supplying producer gasthrough the flow boxes WL", these fioiv boxes operate in conjunctionwith the flow boxes g of the up-burning flues to supply an increasedamount of air through both of the cooperating regenerators G and Hsuioient to voroduce the 3ro 3er combustion of the coke oven C*as 1n theu rburmno b t* flame lines.

By rearrangement of levers and connections a different sequence ofoperation of the regenerator and gas valves can be effected, as,

WWAPvnvArWi/var uuvrawivraivivra ann so forth (in Which formulae, lV isfor Waste heat and A for air and P for producer or other lean gas) Theinvention as hereinabove set forth is embodied in a particular form ofconstruction but may be variously embodied Within the scope of theclaims hereinafter made.

claim:

l. In a coking retort oven battery in combination: a plurality of retortchambers alternef-ling with heating Walls contiguous to such colringchan'ibers and respectively constituted of combustion dues adapted to besubjected to periodical beatings of different intensities; regeneratorsside by side in a ronY and disposed in in-flow and out-flow groups andcommunicably connected with lines, the rcgenerators for each heatingWall being disposed in pairs; flow boxes communicably connected Witheach regenerator of a pair and with a Waste gas outlet, one of said flowboxes and regenerators of a pair being` for air and the other of saidpair for when operating for in-flow and both being for ex haust of Wastegas when operating` for outflow, an air valve for each ioiv box; a Wastelas valve for each flow box, means to convey fuel optionallycommunicable with one of pair of said ioiv boxes or directly with theflues of each heating Wall; a valve in said means to convey fuel gas; apair of rotatable shafts for each two adjacent pairs of regenerators,each shaft having an engager looselj, mounted thereon and each shafthaving an engager fixed thereon on the loose engager of the first shaftbeing operatively connected With the second shaft and the loose engagerof the second shaft being operatively connected with the first shaft; aplurality of progressively movable means adapted to actuate saidengagers in timed relation, one of said progressively movable meansengaging the loosely mounted engagers and the other one engaging thefixedly mounted cngagers, said first shaft being ojjieratively connectedWith the valve in the means to convey fuel gas and With the air valvesof one pair of flow boxes for the pair of regenerators for one heatingWall and with the waste gas valves of the flow boxes of a next adjacentpair of regenerators for another heating Wall, the second shaft beingoperatively connected with the valve in the means to convey fuel gas andwith the air valves for the lioiv boxes of said next adjacent pair ofregenerators for said another heating Wall and With the Waste gas valvesof the ow boxes of the pair of regen erators for said one heating Wall.

2. In a colring retort oven, in combination a plurality of cokingchambers alternatinfy with heating Walls contiguous to such colti.chambers and respectively constituted of a plurality of combustionflues; the heating lues in the heating Walls on two opposite sides ofVeach of a plurality of colring chambers being communicably connectedwith each other; a plurality of pairs of regenerators side by side in arow; a pair of regenerators communicably connected With the fines ofeach heating Wall, one regcnerator of ea pair being adapted to operatefor air and the other for gas When operating for in-iovv and both ofeach pair of regenerators being adapted to exhausting Waste gases whenoperating for out-flow; a flow box for each regenerator, each of saidfioiv boxes having an air valve and a Waste gas valve; means to conveyfuel gas optionally communicable With one flow box of each pair ordirectly with the heating Walls with which said pairs communicate; a gasvalve in said means to convey fuel gas; tivo rotatably mounted shaftsindividual to each colring chamber. that has heating flues on its twoopposite sides cominunicably connected With each other for reversing theflow through said flues; one of said shafts operating` the gas valve andair valves for the flow boxes of the pair of regenerators for theheating Wall on one side of said colring chamber and the Waste valves ofthe flow boxes of the pair of regenerators for the heating Wall on theother side of said colring chamber, the other shaft operating the gasvalve and air valve for the HOW boxes of the pair of regcnerators forthe heatingl Wall on said other side and the Waste gas ternaliy by gasburning combustion lues eX- terior thereto and adapted to be subjectedto periodic beatings of different intensities, in combination; a pair ofregenerators communicating With combustion iiues of the battery; an airvalve for each onev of said pair; a Waste gas valve tor each one ofsaidpair; a 'supply valve for each one of said pair; a pair of valvereversing devices; means operatively connecting each one of thereversing Idevices with the air `valve and'gas valve of one. et theregenerators and with Waste gas valve of the other regenerator; a firstengager means operatively connectedv With the second reversing device toactuate said second reversing device of the pair; and a second enmeansfor the irst of said reversing devices .and operatively connected withsaid iirst reversing devices ;two progressively movable mechanismsoperable in timed relationship, one or said mechanisms being adapted foroperating said reversing' mechanisms and the other being adapted foroperating the first and second engager means. l

a. In a coling retort oven, battery, in combination: combustion chambersadapted t operate in alternation for inilou7 combustion and outLloW ofcombustion products regenerators communicably connected With saidcombustion chambers and disposed in pairs Yfor in-tlovv and out-flow; anair'valve for each regenerator; a gas valve for each regenerator; aWaste'gas valve for each regenerator; a pair of valve reversing devicesVfor each pair of regenerators; means operatively connecting eachreversing device With its respective air valve and gas valve "of oneregenerator and with the Waste gas valve or the other regenerator ot thepair; a iirst engager means operatively connected to said second r.rsing device; a second engager means operatively connected to saidVlirst reversing device; two progressively movable mechanisms operablein timed relationship, one of said mechanisms being adapted foroperating said n' reversing devices andthe other being adapted foroperating the irst and second engager means; said progressively.movablemechanisms being adapted for operating their respective engager meansand reversing devices periodically in succession.

Vregenerators being connected 5. InV a coking retortv oven battery, incombination: colring chambers; heating Walls contiguous to said colringchambers andrespectively constituted of combustion lues regeneratorslocated at a lower level than the cc-lring chambers Vand the heatingvvalls,`the Q ducts with the lines ot heating Walls; said regeneratorsand heating Walls being disposed in pairs for simultaneousVin-ilowandoutflow; an air valve, aV gas valve and'avvaste valveindividual to eachregenerator and heating Wall ora pair; a reversing device for eachregenerator and heating Wall of a pair;

means connecting each reversing device With the air valve and gas valveof itsv regenerator and heating Wall or the pair and With the Waste gasvalve of the other regenerator and heating vvlall of the pair and timedAmeans for effecting timed operationfof a succession of mechanisms` insuccession adapted for actuatingsaid reversing devices successively soas to reverse the flow through each pair of regenerators and heatingWalls in succession and timing means for effecting timed operation ofsaid timed means.

6. In a colring retort oven battery, in combinat-ion: coking chambers;heating Walls contiguous to said coking ohambersand respectivelyconstituted of combustion tlues regenerators located at al lovver levelthan the colring lchambers and the heating Walls; the regeneratorsbeingconnected `by ducts With the flues ofsaid heating Walls; saidregenerators and heating Walls being disposed in pairs for simultaneousiii-lion7 and out-flow; an air valve, a gas valve and a Wastegas valveindividual to each regenerator and heating Wall of a pair; a. reversingdevice for each regenerator and heating Wall of a pair, means connectingeach reversing device with the air valve` and gas valve of itsregeneratorand heating Wall of thelpair and with the Waste gas valve ofthe otherregenerator and heating Wall of the pair; and means mounted forprogressive movement in circuit past the reversing devices for operatingsaid reversing devices to reverse the flow through each pair ofregenerators and heating Walls of the pair.

'i'. In a coling retort oven battery, incombination: oolring chambers;heatingl yvalls contiguous to said coking chambers .andrespectivelyconstituted of combustion flues; regenerators located at a lovver levelthan the cohing chambers and the heating Walls, the regenerators beingconnected by lducts with the lues of said heating Walls; saidregenerators and heating Walls being disposed in .pairs for simultaneousin-flovv and outfiovv; an air valve, a gas valve and a 4Waste gas valvefor each regenerator and heating vvall of a pair; a first and a secondvalve reversing device for each pair of regenerators and heating Walls;means connecting each one of the reversing devices with the air valveand gas valve of one of the regenerators and heating wallsV of the pairand with the waste gas valve of the other regenerator and heating wallof the pair; a i'irst engager means operatively connected with eachsecond reversing device of a pair and a second engager means operativelyconnected with each first reversing device of a pair and timed means foreffecting timed actuation of a series of mechanisms one after anotheradapted for actuating only the reversing devices one after the other andother timed means for effecting timed actuation of only the first andsecond engager means one after the other and timing means for effectingtimed operation of said timed means.

8. In a coking retort oven battery, in combination coking chambers;heating walls contiguous to said coling chambers and respectivelyconstituted of combustion llues; regenerators located at a lower levelthan the coking chambers and the heating walls, the regenerators beingconnected by ducts with the flues of said heating walls; saidregenerators and heating walls being disposed in pairs for simultaneousin-flow and out-flow; an air valve, a gas valve and a waste gas valvefor each regenerator and heating wall of a pair; a lirst and a secondvalve reversing device for each pair of regenerators and heating walls;means connecting each one of the reversing devices with the air valveand gas valve of one of the regenerators andy heating walls of the pairand with the waste gas valve of the other regenerator and heating wallof the pair; a first engager means operatively connected with eachsecond reversing device of a pair and a second engager means operativelyconnected with each first reversing de vice of' a pair and progressivelymovable means for actuating only the reversing devices one after theother and other progressively movabl-e means for actuating only thefirst and second engager means one after the other.

9. In a coking retort oven battery, in combination: a plurality ofcoking chambers; heating walls contiguous to such coking chambers andconstituted of combustion flues; a plurality of flow duct meansrespectively communicably connecting a plurality of said combustionflues with each other for simultaneous inflow and outflow; a pluralityof groups of regenerators, each group comprising regenerators arrangedfor simultaneous inflow and outflow and in communi cation with aplurality of said combustion flues that are in communication with eachother for simultaneous inflow and outflow; means for admitting gas tosaid flues; means for admittingair to the regenerators; means fordischarge of waste gas from the regenerators; liow reversing means foreach of said groups of regenerators; power transmitting means fortransmitting power for actuating mechanisms in succession arrangedcommon to all of said flow reversing means and adapted to operate saidflow reversing means in succession so as to periodicallyreversetlielov:through said plurality of groups of regenerators successively.

10. In a coking retort oven battery, in combination: a plurality ofcoking chambers; heating walls contiguous to such coking chambers andconstituted of combustion iiues; a plurality of groups of regeneratorscommunicably connected with said combustion fluesJ each group comprisingregenerators for simultaneous inflow and outflow; means for admittinggas to said flues; means for admitting air to the regcnerators; meansfor discharge of' waste gas from the regenerators; flow reversing meansfor each of said groups of regenerators; power transmitting means fortransmitting power for actuating mechanisms in succession arrangedcommon to all of said flow reversing means and adapted to operate saidflow reversing means in succession so as to periodically reverse theflow through said plurality of groups of regenerators successively.

1l. ln a coking retort oven battery, in com bination: a plurality ofcolring chambers; heating walls contiguous to such coking chambers andconstituted of combustion llues; a plurality of flow duct meanscommunicably connecting a plurality of said combustion llues with eachother for simultaneous inflow and outflow; a plurality of groups ofregenerators, each group comprising regenerators arranged forsimultaneous inflow and outflow and in communication with a plurality ofsaid combustion flues that are in communication with each other forsimultaneous inflow and outflow; means for admitting gas to said liues;means for admitting air to the regenerators; means for discharge ofwaste gas from the regenerators; flow reversing means for each of saidgroups of regenerators; power transmitting means for transmitting powerfor actuating mechanisms :in succession arranged common to all of saidflow reversing means and adapted to operate said flow reversing meansindividually and in succession so as to periodically reverse the flowthrough said plurality of groups of reg-enerators one at a timeprogressively.

12. in a coking retort oven battery, iu combination: a plurality ofcoking chambers; heating walls contiguous to such colring` chambers andconstituted of combustion flues; a plurality of groups of regeneratorsccmmunicably connected. with said combustion flues, each groupcomprising regenerators arranged for flow simultaneously in the samedirection: means for admitting gas lo said fines; means for admittingair to the regenerators: means for discharge of waste gas from theregenerators; flow reversing means for each of said groups ofregenerators; sequence controlling means for actuating mechanisms insuccession arranged for progressive movement in circuit'past alloi' saidflow reversing means and adapted to operate said flow reversing meansindividus-.lly and in succession so as to periodically reverse the flowthrough said plurality oi groups of regenerators one at a timeprogressively. i

13. In a battery ofl coking' retort ovens, in combination: a pluralityofI coling chambers; heating walls contiguous to such col(- ing chambersand constituted of combustion flues; a plurality of liow duct meanscommunicably connecting Va plurality of said combustion ilues witheachother for simultaneous inflow and outflow;v a plurality of groups ofregenerators, each group comprising regenerators arranged forsimultaneous inflow andV outflow and in communication with a pluralityof said combustion flues that are in coimnunication with each other forsimultaneous inflowand outflow; `means 'for admitting gas to said ilues;means for admitting air to the regenerators; `means for discharge ofwaste gas from the regenerators;

' flow reversing means for each of said groups of regeneratcrs; sequencecontrolling means for actuating mechanisms in succession Vby progressivemovement in circuit past mechanisms to be actuated thereby mounted forprogressive movement in circuit past all of said -flow reversing meansand adapted to operate said flow reversing means in successien so as toperiodically-reverse the flow through the groups of regenerato-rs 'forsaid battery ot ovens successively.

lll. In a battery of coliing retort ovens, in combination: a pluralityof coking chambers; heating walls contiguous to suchcoling chambers andconstituted of combustion iues; a plurality of groups of regeneratorscommunicably connected with said combustion lines, each group comprisingregenerators arranged for simultaneous inflow and outiiow; means foradmitting gas to said flues; means for admitting air to theregenerators; means for discharge of waste gas from the regenerators;flow reversing means for each of said groups of regenerators; sequencecontrolling means for actuating mechanisms in succession by progressivemovement in circuit past mechanisms to be actuated thereby mounted forprogressive mo-vement in circuit past all of said flo-w reversing meansand adapted to operate said flow reversing means in succession so as toperiodically reverse the flow through the groups of regenerators forsaid battery of. ovens successively.

l5. In a coking retort oven battery having retort chambers adapted to berespectively externally heated by gas burning combustion flues adaptedto be subjected to periodic heatings of different intensities and havingregenerators in communication with said flues and having reversingvalves for reversing the flow of gas and air for Vcombustion in saidtlues, in combination: a reversal mechanism comprising a pair ofrotatable members each adapted for edecting an opening and a closingmovement of certain .of said vreversing j valves when rotated; anengager fixed on each member to rotate the same for effecting i bers foreffecting the other of said movei ments by said members when'saidloosely mounted engagers are engaged. Y p

. 16. Ina coliing retort oven battery having retort chambers yadapted tobe respectively externally heated by gas' burning combustion fluesadapted to be subjected to periodic heatings of diilerent intensitiesand having regenerators in` communication withsaid flues and havingreversing valves for reversing the ilow of gas and air for combustion insaid lues, incombination: a reversal mechanism com'- prising a pair ofoppositely disposed rotatable members each adapted for eii'ecting anopening and a closing movement of certain of said reversing valves whenrotated an engager fixed on each of the members to rotate the same foreffecting one of said movements by said member; an engager looselymounted on-each of said members, each loosely mount ed engager beingconnected with the opposite rotatable member of the pair for rotatingthe member for effecting the other of said movements by the member; aplurality of progressively movable mechanisms, one of said mechanismsengaging said loosely mountedvengagersto rotate the oppositely disposedrotatable member of the pair, and the other of said mechanisms engagingthe fixed engagers to rotate the members to which said fixed engagersare fixed.

17. Ina coking retort oven battery, in combination: a series ofalternate substantially parallel retort chambers and Aheatingl wallstherefor arranged side by side, each of said heating walls comprisingcombustion flues operable in alternation for inflow combustion andoutflow of combustion products; a plurality of groups of regeneratorscommunicably connected with said combustion fines. each group comprisingregenerators arranged for simultaneousinflow and outflow; means toconvey fuel gas to said flues; an air supply for the regenerators; wastegas outlets for the regenerators; periodically operable flow reversingdevices for the regenerators and lines; and power transmitting meansAfor transmitting power for actuating mechanisms one after anotheradapted for operating said reversing devices one after another.

18. In a coking retort oven battery, in

combination: a series of alternate substantially parallel retortchambers and heating walls therefor arranged side by side, each of saidheating walls comprising combustion flues operable in alternation forinflow combustion and outflow of combustion products; a plurality ofgroups of regenerators communicably connect-ed with said combustionflues, ach group comprising regenerators arranged for simultaneousinflow and outflow; means to convey fuel gas to said fines; an airsupply for the regenerators; waste gas outlets for the regenerators;periodically operable flow reversing devices for the regenerators andflues; and progressively movable means for actuating mechanisms oneafter another by progressive movement relative thereto adapted foropera-ting said reversing devices one after the other. Y

19. In a colring retort oven battery, in combination: a series ofalternate substantially parallel retort chambers and heating wallstherefor arranged side by side, each of said heating walls comprisingcombustion flues adapted to be subjected to periodic beatings ofdifferent intensities; a plurality of groups of regeneratorscommunicably connected with said combustion iues, each group comprisingregenerators arranged for simultaneous inflow and outflow; means toconvey fuel gas to said fines; an air supply for the regenerators: wastegas outlets for the regenerators; periodically operable flow reversingdevices for the regenerators and flues: and power transmitting means fortransmitting power for actuating devices in succession adapted foroperating said reversing devices in suecession.

20. In a coking retort oven battery, in combination: a series ofalternate substantially parallel retort chambers and heating wallstherefor arranged side by side, each of said heating walls comprisingcombustion fines operable reversely in alternation for inflow combustionand outflow of combustion products; a plurality of groups ofregenerators cemmunieably connected with said combustion fines. eachgroup comprising regenerators arranged for simultaneous inflow andoutflow: means to convey fuel gas to said lues; an air supply for theregenerators; waste gas outlets for the regenerators; periodicallyoperable How reversing` devices for the regenerators and flues; andprogressively movable means for actuating mechanisms in succession byprogressive movement relative thereto adapted for operating saidreversing devices in succession.

2l. In a coking retort oven battery, in combination: a. battery ofcoking chambers and combustion flues therefor. and a battery ofregenerators communicably connected with said combustion fines; meansfor admitting gas to said flues, means for admitting air to theregenerators; means for discharge of waste gas from the regenerators;flow reversing means for each of said regenerators; and powertransmitting means for transmitting power for actuating mechanisms insequence arranged common to all of said flow reversing means and adaptedto operate said flow reversing means in sequence to periodically reversethe flow through the regenerators sequentially.

22. In a colring retort oven battery, in combination: a battery ofcoking chambers and combustion flues therefor, and a battery ofregenerators communicably connected with said combustion flues, saidregenerators being eommunicably connected with the tlues in groupscomprising regenerators adapted for gas flow simultaneously in the samedirection; means for admitting gas to said tluc; means for admitting airto the regenerators; means for discharge of waste gas from theregenerators; flow reversing means for each of said groups ofregenerators; and power transmitting means for transmitting power foractuating mechanisms in sequence arranged common to all of said liowreversing means and adapted to operate said How reversing means insequence to periodically reverse the iiow through the groups ofregenerators sequentially.

n testimony whereof I have hereunto set my hand.

JOSEPH VAN ACKEREN.

for

